Abstract: A plurality of camming surfaces (116) are actuated to move against the top portion of the side walls (38) of a container (36) to turn such top portion in an outward direction relative to the interior of the container sufficiently to enable the seal profile (90) of the top tool assembly (30) of a sealing apparatus (22) to press the outwardly disposed side wall top portions downwardly against an abutment formed by a bottom tool assembly (32) so as to create a horizontal, outwardly disposed sealing flange (40) to which a top film (34) is applied for closure of the container.

Abstract: The present application is directed to a double seam modification tooling apparatus for double seam modification and the double seam modification process. More particularly, a tooling apparatus for double seam modification is provided which adds a third modification operation to the first and second double seam operations which form the finished double seam, as well as a process for modifying double seams to include patterns of integral slots, notches or threads, or the like, after the double seams have been previously completely formed by the double seam modification tooling apparatus. Child resistant lids can then be configured with mating tab notches or tab threads to allow for opening or closing the lid when the tabs are properly aligned with the notches and threads on the can rim modified double seams.

Abstract: A floating joint has a first connection section and a second connection section, which are capable of pivoting relative to each other. In the manufacturing of this joint, a receiving step is performed, in which the flange section of the first connection section, the umbrella section of the second connection section, a ring, and a plate are received within a case. Further, the following steps are performed: a staking step in which an end of the case is staked inward to cover the plate; and a gap adjustment step in which the plate is pressed toward the ring to adjust the gap between the ring and the plate.

Abstract: A method for forming an overwrap container includes the steps of a) providing a base container having a first side seam on a side wall that extends along a longitudinal axis to define an internal volume, and a bottom secured to the side wall; b) providing the side wall of the base container with connecting elements on an outer periphery of the side wall; c) providing an overwrap having a second side seam over the side wall of the base container such that the overwrap is joined in spaced apart relationship by the connecting elements to the side wall of the base container; d) clamping the overwrap to the base container along the second side seam to form a first compressed area; e) clamping the overwrap to the base container in an area 180° removed from the second side seam to form a second compressed area: and f) reforming the second compressed area to define an overwrap container having a substantially uniform spacing and air gap between the base container and the overwrap except in the first compressed area.

Abstract: A plastic container is provided having a sidewall, a downwardly extending upper lip, and a perforated line defined at a top edge of the container where the lip and sidewall are joined. The sidewall and lip may be formed from a container body constructed of a single sheet of material that is wrapped such that marginal edge portions of the blank are brought together in overlapping fashion to form a side seam. When the sidewall and lip are formed from such a blank of material, the perforated line is formed a specified distance below a top edge of such blank. The perforated line reduces the amount of force, heat and lubricant required in order to form (e.g., curl, roll, fold or bend) the upper lip of the container. The slits of the perforated line may extend across a width of the blank in either a uniform or variable fashion.

Abstract: A process for realizing a container from a foldable sheet comprises stages of at least partially inserting a closure element made of paper material (extensible paper) provided with a base wall and a lateral wall internally of a housing chamber of the container. The lateral wall of the closure element is inserted and located at a portion of the wall of the container. Also comprised is a stage of contemporary deformation of the lateral wall of the closure element and the portion of wall of the container in order to realize corresponding grooves on the parts, destined to define coupling and decoupling surfaces by rotation between the closure element and the container. The use of extensible paper advantageously enables easy realization of the coupling grooves by rotation.

Abstract: A container-forming process is used to form an insulative container. The container-forming process includes a staging-materials operation, a body-forming operation, and a brim-forming operation.

Abstract: A method for applying a reclosable pouring element comprising a pouring opening and a flange and having a removable cap, to a container having an opening. The method comprising the steps of connecting the pouring element to a lid of the container having an opening by affixing the flange of the pouring element to the lid in a liquid-tight fashion. Sealing a section of a closure film on the pouring element so that the pouring opening of the pouring element still remains open. Connecting the lid to the container body in a liquid-tight fashion. Sterilizing an interior of the container. Filing the container with a product through the pouring opening. Closing the container by sealing the closure film onto the pouring element in such a fashion that the pouring opening of the pouring element is closed in a liquid-tight fashion and applying the cap to the pouring element.

Abstract: A bottom sealing workstation is provided for a cup forming machine. The bottom sealing workstation has a linear motion assembly, a rotation assembly, a phase change assembly. A first motor is mechanically connected to a linear motion assembly of the bottom sealing workstation to linearly move the linear motion assembly toward a mandrel, a second motor is mechanically connected to a rotation assembly of the bottom sealing workstation to rotate a forming tool in a circle having a radius, and a third motor is mechanically connected to the phase change assembly to adjust the radius of the circle in which the forming tool rotates. Additionally, a controller may be electrically connected to the bottom sealing workstation to send electronic signals to the first and third motors to quantitatively control various assemblies of the bottom sealing workstation.

Abstract: An advanced food container includes a ring frame, a bottom panel and a removable lid. The ring frame includes a tapered wall with a bottom support surface disposed at substantially a bottom thereof and a lid support surface disposed at substantially at top thereof. The bottom support surface is sized to receive the outer perimeter of the bottom panel and the lid support surface is sized to receive the outer perimeter of the removable lid. In a first embodiment, the bottom panel and removable lid are retained with at least two retention projections. In a second embodiment, the bottom panel and removable lid are retained with a plurality of retention protrusions. In a third embodiment, the bottom panel is retained with adhesive and the removable lid is retained with at least one piece of tape. In a fourth embodiment, the bottom panel and removable lid are retained in slots.

Abstract: A container-forming apparatus comprising a movable mandrel supporting the casing and the end member, which closes the open end of the casing and an end sealing station comprising a clamping means in order to press together the edge of the casing, said casing being transferred to the end sealing station by the mandrel, and the edge of the end member, said edge being turned longitudinally towards the casing. The clamping means comprises a piston moving back and forth in the longitudinal direction of the casing, said piston having pushing surfaces approaching the sliding axle in the pushing direction causing the clamping action. The pushing surfaces are the countersurfaces of the clamping members, said clamping members being arranged to turn towards the frame of the clamping means.

Abstract: This invention relates to a method of manufacturing a carton from a PET coated material having an initially separate base and side wall sections which are adhered together by melting the PET coating when the respective sections are suitably disposed with respect to one another and in contact. Subsequent application of pressure to different areas of one or other of the base and/or side wall sections ensures a secure bond therebetween. The invention lies in the application of heat to the material and/or coating such that only sections of board which are to be bonded together receive sufficient heat to cause melting of the PET coating, the remaining surfaces not being subjected to heat or only to an amount of heat which can be withstood by the PET coating without compromise of the fluid resistant properties of the PET coating. A hot air blast acutely angled to the coating ensures the correct application of heat in the desired areas. Heat-splash and other problems caused by over heating are thus avoided.

Abstract: A container comprises a sleeve and two end walls. The sleeve is made of a tube having a plurality of paper layers. The end walls are inserted into the sleeve and are bonded in a sealed way thereto. According to the present invention, each of the end walls has a rim which projects outwards, around which rim the tube is bent and bonded by means of heat sealing. A stable, sealed bonding is thus obtained, whereby the application of different materials for the end walls is possible.

Abstract: A process is provided for closing and hermetically sealing a bottom of a container. A cylindrical container body is provided which has an inside heat-sealable surface and an open bottom end. A flange is formed on and around the bottom end of the cylindrical container body which extends outwardly from the container body at a sharp radius of approximately 90 degrees to an outside surface of the container body and which defines a flat circular heat-sealable surface on an outer side of the flange. A generally circular membrane patch having an inside heat-sealable surface is positioned on the flat circular heat-sealable surface of the container body flange covering the open bottom end of the container body. The heat-sealable surfaces of the container body flange and the membrane patch are heat-sealed to each other for hermetically sealing the container bottom end.

Abstract: A bottom for a paper cup is formed by advancing a punch against a paperboard web to push the web against a cutting edge which cuts out a circular cup bottom blank from the web. The punch is kept in a forward state to clamp an outer peripheral portion of the blank immovably against a surface of a sleeve. A reciprocable draw is advanced against a center portion of the blank to push the center portion into a circular opening of the sleeve while maintaining the clamping force, to cause the center portion of the blank to become stretched. The clamping force is then progressively released to permit the outer peripheral portion to enter the opening and become bent to form a lip extending at a substantially right angle. The lip is compressed within a gap formed between the draw and a surface of the opening. Because of the stretching of the blank, pleats formed in the lip are only in the form of micropleats that are flattened in a non-folded over state.

Abstract: Apparatus for lubricating and curling a rim of a paperboard container includes a housing block defining a central recess sized and configured to accept therein a rim of a paperboard container to be curled. An annular curling channel is disposed in the recess for curling the rim of the paperboard container in response to relative advancing movement between the paperboard container and the housing block. The housing block also defines an annular liquid channel concentrically disposed in surrounding relationship to the annular curling channel for distributing lubricating liquid. A porous liquid transfer ring is attached to the housing block in covering relationship to the annular liquid channel so that lubricating liquid supplied to the liquid channel comes into contact with the liquid transfer ring. The liquid transfer ring includes a circular edge surface which defines a central opening such that the liquid transfer ring extends at least partially over the curling channel.

Abstract: A method of forming a paper container uses a three ply corrugated material having at least one inner or outer sheet of paper that may be stretched or compressed circumferentially to permit subsequent rolling of the corrugated material about a mandrel. A flattening of the upper and lower edges of the corrugated material permit rolling and seaming operations to be used to assemble the bottom to the cup and to form a lip in the upper edge.

Abstract: An apparatus is provided for forming an outwardly-rolled lip on an open end of a deformable cylindrical container body. The apparatus may include a mandrel having a generally cylindrical-shaped portion for movably supporting at least a portion of an interior surface of the container body. The apparatus further includes a lip-forming die assembly forming a part of the mandrel and having an annular cavity defining an open mouth portion and a closed bottom portion which defines a surface area extending generally radially outwardly of the mandrel outer surface and which is oriented with the open mouth portion generally transverse to an outer periphery of the container body and which faces the open end of the container body around the periphery. An axial forcing member contacts the other end of the container body for axially moving the container body along the outer surface of the mandrel and the container open end into and through the die assembly.

Abstract: A machine for producing containers comprises processing stations with components adaptable to the shape and size of the material sections used for the container. In the case of a change in form, in particular a change in the format of the sections of material to be used, it is necessary to change the relevant adaptable components. Instead of the conventional approach where the new components must be fine-tuned after an exchange has taken place, fitting surfaces are provided at the processing stations, against which a section of the adaptable components can always be placed in the same position. Therefore, time-consuming installation of exchangeable machine components is avoided.

Abstract: A method of producing a tinned food container has a container body 1 of a flat material, especially aluminum strip or tinplate strip which is deep-drawn and which, at least in the region of its planar end flange, is provided with a coating 2, especially a sealing coating, and has a cover 4 provided with a further coating, especially a further sealing coating, and is made of a foil material, especially aluminum foil, is sealed on to the edge flange under the influence of pressure and/or heat. To make the production method more economical, and for producing a container body with an intermediate sealing layer 3 additionally inserted during the sealing-on operation, first the blank for the container body 1 and intermediate sealing layer 3 is punched in one piece out of the flat material. Then the intermediate sealing layer 3 subsequently is separated from the container body 1 in the region of the edge flange.

Abstract: A bottom blank maker workstation for a cup making machine is disclosed. The cup making machine is of the type having a rotating turret and a plurality of mandrels arranged to interact with a plurality of workstations. The turret moves each mandrel in a stepwise fashion through the plurality of workstations where a bottom blank and a sidewall blank are formed and attached to one another to create a container. The workstation includes a reciprocable punch and draw that cooperate with an abutment surface and a series of protrusions to impress the lip of the bottom blank with a series of indentations. The indentations promote a better seal to the sidewall blank.

Abstract: A workstation for use with a turret type cup making machine is disclosed. The workstation is designed for sealing and finishing the bottom regions of paperboard style cups. A finishing wheel is mounted to a pair of nested housings that are configured to move the finishing wheel in a radially outward direction when one housing is rotated with respect to the other. Thus, the finishing wheel is moved longitudinally into the recessed bottom of a cup and then one housing is rotated with respect to the other forcing the finishing wheel radially outwardly until it contacts the bottom of the cup including portions of the sidewall blank and the bottom blank. This radial movement squeezes the cup bottom between the finishing wheel and an annular abutment wall. Meanwhile, the housings and finishing wheel are rotated together to drive the finishing wheel about the perimeter of the cup bottom to squeeze and seal the sidewall blank to the bottom blank.

Abstract: A workstation for a use with a turret-type cup making machine is disclosed. The workstation is designed for use in making containers, such as paperboard style cups. The workstation includes a rotatable roller assembly and a rotationally stationary guide member which cooperate to curl the sidewall blank with respect to the bottom blank. The rollers and guide member have adjacent surfaces designed to curl the bottom edge of a sidewall blank around a lip of the bottom blank and back into the recessed area at the bottom of the container.

Abstract: A tamper evident container assembly includes a container body having a bottom wall and peripheral side wall, the side wall terminating in an outwardly curled rim. A reusable lid includes a top wall portion and a depending skirt portion, the depending skirt portion constructed of spiral wound stock and having a free end, a major peripheral portion of the free-end rocked under the upper rim and upwardly into engagement with the side wall, with a minor peripheral portion of the free end left untucked to thereby provide a gripping area to facilitate tearing and removal of the tear strip. The depending skirt portion is further provided in a lower portion thereof with a line of weakening extending annularly about the skirt portion to thereby define an annular removable tear strip inclusive of the free end, with the line of weakening lying on the rim, between upper and lower edges of the rim.

Abstract: A machine for making cups of thermoplastic coated paper, the machine including a frame or housing having a turret rotatably mounted on the frame, a number of work stations mounted on the frame in an equally spaced relation around the turret, a number of mandrels corresponding to the number of work stations mounted on the turret and a curling die mounted on the turret in radial alignment with each of the mandrels. The turret being rotated intermittently to align the mandrels sequentially with the work stations, the work stations being movable radially inwardly into a working relation with each mandrel, the mandrels being moved radially inwardly simultaneously with the work stations to form a tucked curl on the top edge of the cup.

Abstract: A machine for making cups of thermoplastic coated paper, the machine including a frame or housing having a turret rotatably mounted on the frame, a number of work stations mounted on the frame in an equally spaced relation around the turret, a number of mandrels corresponding to the number of work stations mounted on the turret and a curling die mounted on the turret in radial alignment with each of the mandrels. The turret being rotated intermittently to align the mandrels sequentially with the work stations, the work stations being movable radially inwardly into a working relation with each mandrel, the mandrels being moved radially inwardly simultaneously with the work stations to form a tucked curl on the top edge of the cup.

Abstract: Empty cans are formed in preparation for being filled. The empty can includes a sleeve and two end walls. One of the end walls contains a filler opening for enabling product to be subsequently inserted into the can and thereafter discharged from the can. The filler openings can be closed by tear strips or screw caps.

Abstract: A round container which is intended for dispatch in the empty state possesses a side wall and at least one closure wall, sealingly and firmly inset into the side wall at an angle to it, which closure wall is for example a base. The side wall consists at least partly of a transparent sheet part having a thickness of 130 to 500 .mu.m. To enable a part of the side wall to be printed in an appealing form and the intrinsic stiffness of the round container to be improved in spite of the viewing facility provided, the edge of the side wall towards the closure wall is formed, around the periphery, at least partly as cardboard part from a cardboard material having a weight per unit area of at least 150 g/m.sup.2, sheet part and cardboard part not overlapping each other in a partial region serving as viewing opening.

Abstract: A corrosion resistent protective plastic overlay is intimately engaged with the chime of a fibre drum and extends from an inner edge portion thermally bonded to the drum lining over the bead and into the exterior chime groove. The overlay is fusion bonded to the chime throughout the full extent of the surface-to-surface engagement therebetween.

Abstract: This relates to a bottom construction for a composite container wherein the container body is of a composite construction such as a wound paper tube having a plastic material liner. The bottom construction includes a generally cup-shaped closure element formed from a plastic material sheet which is molded in situ within the bottom end of the tubular body with the plastic material being heated to a molding temperature with the temperature being such that the plastic material of the closure will self-bond to the plastic material of the liner. The closure is of a generally hat-shaped configuration and includes a central cup portion which is telescoped within the end of the tubular body and which is then provided with a reinforcing disk, after which the extreme end portion of the tubular body is curled or rolled radially inwardly to abut against the underside of the reinforcing disk to complete the bottom construction.

Abstract: A sealed laminated vessel is formed from a barrel composed of a laminate including a paper substrate and a metal foil with inner and outer heat-sealable resin layers on both surfaces lapped together to form a straight side seam and a lid member on at least one open end thereof formed from a laminate of a metal foil and heat-sealable resin layer which is heat sealed to a circumferential end edge portion of the barrel. The vessel is formed by a process which includes forming a flat circumferential end portion of the barrel by bending at least one open end of the barrel outwardly and thereafter inwardly bending a part of the bent portion in the reverse direction so that it is lapped on the lower side of the remaining part of the bent portion to form a flat circumferential end portion on at least one open end of the barrel.The lid member is thereafter heat-sealed to the circumferential portion of the barrel through the heat-sealable resin layer of the lid member.

Abstract: Discrete sheets of separator material for use in dry cells are introduced tangentially into an annular clearance between the cylindrical internal surface of an outer tool and the cylindrical peripheral surface of an inner tool, and the inner tool is rotated about its axis while one or more spring-biased rollers urge the sheet in the clearance against its peripheral surface so that the sheet is converted into an inner tube which tends to expand radially and is introduced into an outer tube in response to axial shifting of the inner tool. A shoulder between the inner tool and a support for the inner tool pushes one end face of the inner tube from the clearance, and the inner tube is free to expand radially into contact with the internal surface of the respective outer tube in response to complete expulsion from the outer tool.

Abstract: A paperboard container having a side wall formed from a single blank. A band or zone along one edge of the blank is provided with a plurality score lines each of whose edges are non-parallel to thereby yield a wedge score indentation. The blank is rolled to assume a round or rectangular cross-section tube, and the band is bent inwardly and sealed against a closure disc or panel. By virtue of the wedge shape of the scores, the resultant gathers in the band are substantially confined within the wedge scores to yield a more uniform seal between the inwardly bent band and the closure disc or panel.

Abstract: In a method of producing a container having a bellows bottom (2) and a protection lid (3), sleeve (1) is maintained in one axial position while a bellows bottom blank (27) is pressed into sleeve (1) to a position whereat it is welded in place by heating the thermoplastic, whereupon sleeve (1) is axially moved to and maintained in another position and lid blank (3) is pressed into sleeve (1) to position whereat lid blank (3) is similarly welded in place. The apparatus comprises a carrier (9) having an opening for supporting sleeve (1) in each of two (raised and lowered) positions, a welding ring (10) around the opening for melting the adhesive, and a plunger (11) for successively pressing the two blanks (27, 3) into sleeve (1), while at the same time shaping them and forming a folded rim or flange on each.

Abstract: A method and an apparatus for manufacturing a tin-like container comprising a sleeve formed body or jacket (1) and at least one end closure (2, 3), in which the jacket (1) and the end closure or the end closures (2, 3) at the interior side of the container has a layer (5) of a constant heat weldable, high frequence weldable or ultrasonic weldable material, and in which the container is closed under sealed condition in that the end closure (2, 3) is formed with an edge flange extending all around the end closure and is introduced in the jacket (1) and is welded thereto. The introduction of the end closure (2, 3) in the jacket (1) is made by means of a press piston (14) having a press cone (15) which is formed with an expandable means (15d; 29).

Abstract: The present invention relates to a glue-free method for sealing closures to paperboard food containers, and also to the novel closures for such method. The present invention is particularly applicable to containers for moisture sensitive food items such as salt, and is characterized in the use of a thermoplastic vinyl chloride ethylene copolymer which functions both to provide a heat seal and effective resistance to moisture vapor transmission. The copolymer has sufficient slip to permit handling of the closures in automatic forming and heat sealing equipment.

Abstract: A bottom expander for a flat bottom paper container of noncircular cross-section comprises a ring having an aperture surface for closely embracing the bottom rim of a container and plate-like tool elements, each having a radially outer edge surface which opposes and clampingly cooperates with that aperture surface. Each tool element is fastened to the front end of a leaf spring, the rear end of which is anchored in fixed relation to a support for the ring. The leaf springs support the tool elements in coplanar relation and so flex as to confine the tool elements to translatory motion that carries their outer edge surfaces toward and from the aperture surface, thus eliminating sliding guidance for the tool elements. The leaf springs also bias the tool elements to home positions in which they are spaced from the aperture surface.

Abstract: The present invention is directed to an apparatus and method wherein preprinted rectangular blanks of longitudinally stretch-oriented foam sheet material are continuously formed into cylinders by a tubular forming mandrel on which the blanks are folded, seamed and thereafter transferred onto final forming mandrels. Subsequently, the blanks and the final mandrels are heated to shrink the blanks so that they assume the shape of the final forming mandrels. In forming containers, means are provided to place bottom blanks on the product mandrels prior to the loading of the cylinders thereon so as to shrink the cylinders to sidewall shapes overlying the bottom blanks. The top curl on containers such as drinking cups and food tubs is formed after shrink forming. Further, the bottom seam of the container may be reinforced by ironing after shrink forming.

Abstract: A method of making cups includes forming blanks of a cup sidewall portion, lubricating the upper inside edge of the cup prior to forming the same into a substantially frusto-conical configuration by sealing its opposite edges and the application of tools which curl and then roll the upper edge of the sidewall portion to form the cup rim. The lubricant is applied to the sidewall blank by means of an applicator consisting of an arcuate wick secured between a pair of mounting plates which move the wick into engagement with each blank between the die cutter and the cup forming stations.

Abstract: A composite container for fluent materials in the liquid or semi-frozen state is disclosed, together with a method for making the same. The container includes a vertically arranged body member that is flared at its upper end, and an end closure member is provided including a circular central panel portion arranged within and extending across the upper end of the body member, annular chuck wall portion extending upwardly from the central panel portion adjacent the flared portion of the body member, and an annular connecting flange portion extending radially outwardly from the upper end of the chuck wall portion. The invention is characterized in that the connecting flange and chuck wall portions cooperate with the flared portion of the body member to define an annular space in which is arranged a resilient annular mass of sealing material.

Abstract: An improved multi-station machine is disclosed for assembling ring-type closures from generally cylindrical paperboard cylinders and generally circular paperboard discs. The machine employs a rotatable dial plate, carrying eight mandrels and an improved ring clamping system, which dial plate is incrementally rotated by an automatic indexer assembly relative to the various operating stations which consist of a ring feed station, a disc feed station, an adhesive dispensing station, a curling station, a grooving station and a closure ejecting station. Means are provided for controlling the operation of the various stations so that they operate in substantial synchronism with one another and with the rotatable dial plate. The improved disc feed station automatically feeds the lowermost disc from a stack of discs to a position over a ring on the dial plate and simultaneously forms a peripheral skirt on the disc and positions it in an open end of the ring.

Abstract: A machine for forming a corrugated package from sheet material including a rotatable corrugation head having a fluted periphery and a front face; corrugating means and sealing means movable into association with the head for corrugating an inner sheet material and sealing two plys of material together, respectively; means for feeding an inner sheet having a selected length and width to the head adjacent said corrugating means and means for feeding an outer sheet having a selected length and width to the head adjacent the sealing means; means for moving a bottom wall member having a selected shape into engagement with the front face of the head and associated with the first and second sheets to form the bottom wall of the package; and means to control the operation of said machine so that the rotation of said head and the function of the above-described components are coordinated to form a corrugated side wall of the package from two sheets simultaneously with the joinder of said side wall with the bottom wall

Abstract: A composite can construction wherein the body wall, adjacent either one or both cap receiving ends thereof, is inwardly compressed to reduce the outside diameter of the tubular body while maintaining the inside diameter. The compression, reducing the thickness of the body wall, also densifies the material thereof without effecting the interior of the container or the structural integrity thereof. The compressed area extends along the length of the container body a distance sufficient to project substantially beyond the bead formed as a metal end cap is seamed to the body, thus providing a recess for facilitating accommodating of the driving wheel of a conventional can opener. The formed bead, utilizing the pre-compressed body portion and the denser material thereof, is relatively narrower and stiffer than the bead conventionally obtained upon the sealing of a metal end cap to a composite tubular body.

Abstract: The present invention is directed to an apparatus and method wherein preprinted rectangular blanks of longitudinally stretch-oriented foam sheet material are continuously formed into cylinders by a tubular forming mandrel on which the blanks are folded, seamed and thereafter transferred onto final forming mandrels. Subsequently, the blanks and the final mandrels are heated to shrink the blanks so that they assume the shape of the final forming mandrels. In forming containers, means are provided to place bottom blanks on the product mandrels prior to the loading of the cylinders thereon so as to shrink the cylinders to sidewall shapes overlying the bottom blanks. The top curl on containers such as drinking cups and food tubs is formed after shrink forming. Further, the bottom seam of the container may be reinforced by ironing after shrink forming.

Abstract: A method and apparatus are provided for forming two-piece drinking cups and containers from conventionally shaped arcuate sidewall blank and bottom blanks of filled polypropylene sheet material or polypropylene-polyethylene copolymer sheet material with approximately 40% talc or calcium carbonate as a filler. The arcuate blanks for the sidewall and the bottom blanks are run through relatively standard two-piece container or cup making machinery utilizing patterned air jet heating means to heat areas of the filled plastic sheet material such that the sidewall and bottom curl seams can be heat sealed on the forming mandrels of the machinery and the top curl can be placed in the container by heating and substantially conventional forming dies. The seaming structures so produced are extremely water tight and of high strength characteristics.

Abstract: The invention relates to apparatus for securing covers to metal foil containers, and for sealing the containers. The containers are of the type which have an open top, a horizontal flange surrounding the open top, and a peripheral vertical flange surrounding the horizontal flange, and the cover rests on the horizontal flange. The apparatus includes a stationary platform, on which the unsealed container rests, and a ring which surrounds the platform. The ring is vertically movable, and the top surface of the ring engages the horizontal flange of the container to move the container with it. Located above the ring is a die with an inner camming surface, and the ring will move the container upward so that the vertical flanges of the container engage the inner camming surface to crimp the flange inwardly and downwardly. A press then moves downwardly through an opening in the die to press the crimped flange down so that the cover is secured to the container and the container is sealed.

Abstract: Apparatus for positioning a chime ring member of a drum closure assembly into an interference, fitted relationship, with a fibre drum. The apparatus comprises a support frame and a sliding head assembly mounted on the support frame. The sliding head assembly includes a chime ring retaining member. A drum support assembly is also mounted on the support frame and includes a first and second drum retention means. The first drum retention means prevent movement of the drum during positioning of the chime ring member while the second drum retention means guides the concentric expansion of the top portion of the drum. Means are also provided for actuating movement of the sliding head assembly as well as a source of power for supplying energy to the sliding head assembly.

Abstract: A method and apparatus are provided whereby a generally tubular container is formed on a mandrel with an end member being sealed to the container sidewall to form an open-topped container. The open-topped container is subsequently conveyed through one or more finishing stations for appropriate finishing of the container's open end in order to ready the container for filling and acceptance of a closure. As the open ended container is conveyed incrementally to and received at one or more finishing stations, the bottom of the container is gripped while appropriate modifications are made to the top burner.

Abstract: Forming electric field in and out of the vertical overlap portion, bottom peripheral joint portion and top peripheral rolled portion of a paper cup of paper or like material lined with a laminate, supplying charged powder particles in the space of said formed electric field to powder coating on said portions and with subsequent heat treatment, sealing layers are formed on said portions to become water tight; providing outside electrodes at the outside of said vertical overlap portion and folded portions and providing opposed electrodes in the inside of the paper container, providing a powder supplying means for blowing powder to said sealed portions and masking means for masking the portions not powder coated to securely seal said vertical overlap portion and folded portions.

Abstract: A composite container body having metal ends secured thereto by means of conventional crimping, and intended for opening by use of any of the various types of toothed driving wheel can openers presently in service. In a particularly preferred embodiment this is accomplished by compressing and densifying the end portion or portions of the composite container body a sufficient distance along its length to eliminate or at least minimize any interference between the toothed driving wheel of the can opener and the exterior of the container body. A weakening score line is preferably provided around the periphery of the metal end to be opened to even further reduce the resistance to cutting encountered by the cutter element as the toothed driving wheel advances said cutter element about the periphery of the container.